SU1760217A1 - End seal for rotating shaft - Google Patents

Abstract

The invention: on the shaft 1 there are rigid rotating rings 2, 3 and elastic elements 8 spring-loaded to them, Ring 2 is made with a hub, on which the ring Zc is rigidly fixed to form a cavity 4 between them, the Neutrachus ring of the friction ring 5 is covered by a holder C, rigidly fixed in the housing 7, and placed inside the cavity 4. The elements 8 are located between the end surfaces of the rings 5, which secure the rotation of the holder 6 from over view and are axially displaced therein. The secondary sealing elements are placed between the outer surfaces of the rings 5 and the inner surface of the sleeve 6 and are made in the form of a liquid sealing gasket 11.3 sludge.

Description

The invention relates to a sealing technique, in particular, to end seals for rotating shafts, and can be used, for example, to seal the connection of rotating rollers with liquid friction bearings (FBL) of rolling mills, which require movement of the rolls in FB in the axial and radial direction x

The aim of the invention is to improve the reliability of the mechanical seal.

FIG. 1 shows the mechanical seal, cross section; FIG. 2 is a section A-A in FIG. one; in fig. 3 is a view B in FIG. one.

The mechanical seal contains a rotating ring 2 fixed on the shaft 1 with a hub on which another rotating ring 3 is fixed with the formation of a cavity 4 between them. Non-rotating friction rings 5 are enclosed by a ferrule 6 rigidly fixed in the housing 7, placed inside cavity 4 and spring loaded

between each other elastic elements 8 located inside the same cavity 4.

The rings 5 are fixed in the holder 4 against twisting and placed in the latter with the possibility of axial movement.

On the end planes of the rings 5, protrusions 9 are made, one of which (see section A-A) enters groove 10 (see view B), and the others, leaning on each other, keep the sealing rings 5 from turning. The gap between the sleeve 6 and the rings 5 is filled with a liquid sealing gasket 11. There is an opening 12 for supplying lubricant and balancing the pressure in the holder 6 (or ring 4).

When moving the shaft 1 (rolling mill rolls) in the axial direction together with the shaft of the ring 2 and 3 move the sealing rings 5 according to the inner diameter of the sleeve 6, When the shaft 1 (rolling mill rolls) moves in the radial direction of the sealing plane X-X

Xj

Oh oh

Yu

Lets 5 move along the planes of the rings 2

of.

When sealing bearing assemblies on shafts with angular vibrations, the sealing rings 5 have the ability to oscillate within the thickness of the sealing rings 5, without disturbing the sealing of the seal. The wear of the rubbing surfaces is compensated by the force of pressing the spring 8.

Claims (1)

The invention provides a mechanical seal for a rotating shaft, comprising a housing, rigid rotating rotary rings mounted on the shaft, and elastic elements spring-loaded to them, rigid non-rotating friction rings, secondary sealing elements, characterized in that // 8 112 11 - Fig 1 increase reliability, one of the rotating friction rings is made with a hub on which another rotating friction ring is rigidly fixed to form 5 cavities between them, and the non-rotating friction rings are covered by a clip rigidly fixed in the housing and placed inside the said cavity, while the elastic elements located between the end 10 surfaces of non-rotating friction rings, which are fixed in the holder against rotation and placed in the latter with the possibility of axial movement, and the secondary sealing elements azmescheny 15 between the outer surfaces of the friction rings nevraschayuschihs and the inner shell surface and formed as a liquid gasket, Aa Phage. 2 View 6